CN108761629B - Composite polarizing structure and preparation method thereof - Google Patents
Composite polarizing structure and preparation method thereof Download PDFInfo
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- CN108761629B CN108761629B CN201810966965.4A CN201810966965A CN108761629B CN 108761629 B CN108761629 B CN 108761629B CN 201810966965 A CN201810966965 A CN 201810966965A CN 108761629 B CN108761629 B CN 108761629B
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- 239000002131 composite material Substances 0.000 title claims abstract description 32
- 238000002360 preparation method Methods 0.000 title abstract description 14
- 230000001681 protective effect Effects 0.000 claims description 18
- 238000000034 method Methods 0.000 claims description 14
- 238000010147 laser engraving Methods 0.000 claims description 12
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 9
- 238000005516 engineering process Methods 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 6
- 238000010521 absorption reaction Methods 0.000 claims description 5
- 238000010276 construction Methods 0.000 claims description 4
- 239000000945 filler Substances 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 9
- 238000004519 manufacturing process Methods 0.000 description 5
- 239000004973 liquid crystal related substance Substances 0.000 description 3
- -1 acryl Chemical group 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 229920006267 polyester film Polymers 0.000 description 1
- 230000001902 propagating effect Effects 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0033—Means for improving the coupling-out of light from the light guide
- G02B6/0056—Means for improving the coupling-out of light from the light guide for producing polarisation effects, e.g. by a surface with polarizing properties or by an additional polarizing elements
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0065—Manufacturing aspects; Material aspects
Abstract
The invention discloses a composite polarizing structure and a preparation method thereof, wherein the composite polarizing structure comprises a polaroid and a light guide layer, the light guide layer is arranged on the polaroid, the light guide layer comprises an upper surface which is arranged away from the polaroid, a plurality of light guide holes which are arranged at intervals are arranged on the upper surface of the light guide layer, the central lines of the light guide holes and the upper surface of the light guide layer form a first angle, and the light guide holes are used for refracting light beams entering the light guide layer when the light beams pass through the light guide holes so as to enable the light beams to enter the polaroid. By adopting the composite polarizing structure and the preparation method thereof, part of light beams to be emitted out of the light guide layer can be directly refracted into the polaroid, so that the incident light quantity of the polaroid is increased, and the brightness of a display screen is improved; in addition, the probability that the light beams with weaker intensity pass through the light guide holes is increased, so that more light beams enter the polaroid close to the second side face after being refracted through the light guide holes, and the brightness of the display screen is uniform.
Description
Technical Field
The invention relates to the field of display, in particular to a composite polarized light structure and a preparation method thereof.
Background
Currently, an active reflective liquid crystal display mainly includes a light source, a light guide plate, a first polarizer, a liquid crystal and a second polarizer. The light beam emitted by the light source enters the first polaroid from the light guide plate, the light beam is converted into polarized light through the first polaroid, then the light which is electrically modulated by the liquid crystal enters the second polaroid for analysis, so that the different polarized lights generate light-dark contrast, and further a picture is generated. However, since the light beam is lost during the propagation process, and part of the light beam is directly emitted through the light guide plate, less light enters the polarizer, and thus the brightness of the display screen is low and uneven.
Disclosure of Invention
The invention discloses a composite polarizing structure and a preparation method thereof, which can increase light beams entering a polaroid, are beneficial to reducing light loss and improving display brightness and display uniformity of a display screen.
In order to solve the above technical problems, in a first aspect, the present invention provides a composite polarizing structure, including:
a polarizer; and
the light guide layer is arranged on the polaroid, the light guide layer comprises an upper surface deviating from the polaroid, the upper surface of the light guide layer is provided with a plurality of light guide holes arranged at intervals, the central lines of the light guide holes and the upper surface of the light guide layer form a first angle, and the light guide holes are used for enabling light beams incident on the light guide layer to be refracted when passing through the light guide holes so that the light beams enter the polaroid.
As an alternative embodiment, in an embodiment of the first aspect of the present invention, the light guiding layer further includes a lower surface disposed opposite to the upper surface, and the lower surface is connected to the polarizer;
the opening of the light guide hole is positioned on the upper surface of the light guide layer, the light guide hole extends from the upper surface to the lower surface, and the extending depth of the light guide hole in the light guide layer is two thousandths to one hundredth of the thickness of the polaroid.
As an alternative implementation manner, in an embodiment of the first aspect of the present invention, the light guiding hole is an elliptical hole, a length of a major axis of the light guiding hole is two-fifths to four-fifths of the extended depth of the light guiding hole, and a length of a minor axis of the light guiding hole is one-fifth to three-fifths of the extended depth of the light guiding hole.
As an optional implementation manner, in an embodiment of the first aspect of the present invention, the plurality of light guide holes are uniformly arranged on the upper surface of the light guide layer; or the plurality of light guide holes are distributed from the first side surface of the light guide layer from sparse to dense to the second side surface of the light guide layer, and the second side surface of the light guide layer is opposite to the first side surface of the light guide layer.
As an alternative embodiment, in an embodiment of the first aspect of the present invention, each of the centerlines of each of the light guide holes is disposed in parallel, and the light guide holes are disposed obliquely from the upper surface of the light guide layer to the lower surface of the light guide layer.
In an alternative embodiment, in an embodiment of the first aspect of the present invention, the first angle is 30 degrees to 150 degrees, and the center line of the light guiding hole is 90 degrees with respect to the absorption axis of the polarizer.
As an optional implementation manner, in an embodiment of the first aspect of the present invention, the composite polarizing structure further includes a protective film, where the protective film covers the upper surface of the light guiding layer, and the protective film completely covers the light guiding hole and forms a closed space with a filling medium between the protective film and the light guiding hole.
As an alternative embodiment, in an embodiment of the first aspect of the present invention, the filling medium is air.
In a second aspect, the invention further provides a preparation method of the composite polarizing structure.
As an alternative embodiment, in an example of the second aspect of the present invention, the preparation method includes: forming a light guide layer on the polarizer; and processing the light guide layer to form a plurality of light guide holes arranged at intervals on the light guide layer, wherein the center line of the light guide holes and the upper surface of the light guide layer form a first angle.
In an embodiment of the second aspect of the present invention, an acryl film is uniformly coated on the polarizer to form the light guide layer.
As an optional implementation manner, in an embodiment of the second aspect of the present invention, the processing the light guiding layer to form a plurality of light guiding holes disposed at intervals on the light guiding layer specifically includes: performing laser engraving on the light guide layer by adopting a laser engraving technology, and forming a plurality of first holes which are arranged at intervals; and removing the residual light guide layer material in each first hole to form the light guide holes.
In an alternative embodiment, in an embodiment of the second aspect of the present invention, the method further includes forming a protective film on the light guiding layer.
According to the composite polarizing structure and the preparation method thereof, the light guide hole forming a certain angle with the light guide layer is formed in the light guide layer, so that light beams entering the light guide layer are refracted when passing through the light guide hole, and part of light beams originally and directly emitted out of the light guide layer are refracted and enter the polarizer, and the incident light quantity of the polarizer is increased, so that the brightness of a display screen is improved.
In addition, because the light can be lost in the transmission process, the light intensity of the light beam which is closer to the second side surface of the light guide layer is weaker, and therefore, the probability that the light beam which is closer to the second side surface of the light guide layer passes through the light guide holes and is refracted into the polaroid can be increased by arranging a plurality of light guide holes from the first side surface of the light guide layer to the second side surface of the light guide layer from sparse to dense, and the brightness of the display screen is uniform.
In addition, by using the preparation method of the composite polarizing structure, the polarizer and the light guide layer can be connected in a seamless manner, and the loss of light beams in the transmission process is reduced.
Drawings
FIG. 1 is a schematic diagram of a composite polarizing structure according to an embodiment of the invention;
FIG. 2 is a schematic view of a light guiding hole according to a first embodiment of the present invention;
FIG. 3 is a top view of an upper surface of a light guiding layer according to an embodiment of the present invention;
FIG. 4 is a schematic view of a light guiding hole according to a first embodiment of the present invention;
FIG. 5 is a schematic diagram of a first arrangement of light guide holes according to a first embodiment of the present invention;
FIG. 6 is a schematic diagram of a second arrangement of light guide holes according to a first embodiment of the present invention;
FIG. 7 is a schematic diagram of a third arrangement of light guide holes according to a first embodiment of the present invention;
FIG. 8 is a schematic diagram of a fourth arrangement of light guide holes according to a first embodiment of the present invention;
FIG. 9 is a schematic diagram of a fifth arrangement of light guide holes according to a first embodiment of the present invention;
FIG. 10 is a schematic diagram of a sixth arrangement of light guide holes according to a first embodiment of the present invention;
FIG. 11 is a schematic diagram of a seventh arrangement of light guide holes according to a first embodiment of the present invention;
FIG. 12 is a schematic view of an eighth arrangement of light guide holes according to a first embodiment of the present invention;
fig. 13 is a schematic diagram of a ninth arrangement of light guide holes according to the first embodiment of the present invention;
fig. 14 is a schematic view of a tenth arrangement of light guide holes according to a first embodiment of the present invention;
FIG. 15 is a schematic view of an eleventh arrangement of light guide holes according to a first embodiment of the present invention;
fig. 16 is a flowchart of a method for preparing a composite polarizing structure according to a second embodiment of the invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the present invention, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate an azimuth or a positional relationship based on that shown in the drawings. These terms are only used to better describe the present invention and its embodiments and are not intended to limit the scope of the indicated devices, elements or components to the particular orientations or to configure and operate in the particular orientations.
Also, some of the terms described above may be used to indicate other meanings in addition to orientation or positional relationships, for example, the term "upper" may also be used to indicate some sort of attachment or connection in some cases. The specific meaning of these terms in the present invention will be understood by those of ordinary skill in the art according to the specific circumstances.
Furthermore, the terms "mounted," "configured," "provided," "connected," and "connected" are to be construed broadly. For example, it may be a fixed connection, a removable connection, or a unitary construction; may be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements, or components. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
Furthermore, the terms "first," "second," and the like, are used primarily to distinguish between different devices, elements, or components (the particular species and configurations may be the same or different), and are not used to indicate or imply the relative importance and number of devices, elements, or components indicated. Unless otherwise indicated, the meaning of "a plurality" is two or more.
The technical scheme of the invention will be further described with reference to the examples and the accompanying drawings.
Example 1
Referring to fig. 1 to 4, a composite polarizing structure provided in an embodiment of the invention includes a polarizer 10 and a light guiding layer 20, wherein the light guiding layer 20 is disposed on the polarizer 10, the light guiding layer 20 includes an upper surface 21 disposed away from the polarizer 10, the upper surface 21 of the light guiding layer 20 is provided with a plurality of light guiding holes 25 disposed at intervals, a central line (not labeled) of the plurality of light guiding holes 25 and the upper surface 21 of the light guiding layer 20 form a first angle α, and the light guiding holes 25 are used for refracting a light beam incident on the light guiding layer 20 when passing through the light guiding holes 25, so that the light beam enters the polarizer 10.
In this embodiment, the composite polarizing structure can be applied to a display screen, so that a part of light beams far away from the polarizer 10 can be refracted through the light guide holes 25 and then enter the polarizer 10, thus, the light beams entering the polarizer 10 can be effectively increased, and the brightness of light emitted through the polarizer 10 is higher and more uniform.
In this embodiment, the light guiding layer 20 may be a square plate attached on the polarizer 10 or a light guiding film (such as an acryl film) attached on the polarizer 10.
Further, the light guiding layer 20 further includes a lower surface 22 disposed opposite to the upper surface 21, and a first side and a second side connected between the upper surface and the lower surface, wherein the lower surface 22 is connected to the polarizer 10, and the first side is opposite to and parallel to the second side.
In this embodiment, the openings of the light guide holes are located on the upper surface of the light guide layer, the central lines of the light guide holes 25 are disposed in parallel, and the light guide holes 25 are disposed obliquely from the upper surface of the light guide layer 20 to the lower surface 22 of the light guide layer 20, and the first angle α is 30 to 150 degrees. By adopting the mode that all the central lines are arranged in parallel, light after being refracted by the light guide holes 25 is not refracted secondarily by the light guide holes 25 any more, and the loss of light intensity is reduced; setting the first angle α to be 30 to 150 degrees allows as much refraction of the incident light beam through the light guide hole 25 as possible into the polarizer 10, thereby improving the brightness of the display screen.
Specifically, the light guiding hole 25 may be disposed between 30 degrees and 150 degrees, and when the first angle α is 30 degrees, the center line of the light guiding hole 25 forms an included angle of 60 degrees with the first side surface 23, and when the first angle α is 150 degrees, the center line of the light guiding hole 25 forms an included angle of 60 degrees with the second side surface 24.
Preferably, the first angle α is 120 to 150 degrees, and more incident light may enter the polarizer 10 during this angle interval.
In this embodiment, the center line of the light guide hole 25 forms 90 degrees with the absorption axis of the polarizer 10, so that after the incident light beam is refracted by the light guide hole 25, the angle of the absorption axis of part of the incident light beam entering the polarizer 10 is close to 90 degrees, so that the absorption rate of the polarizer 10 for the incident light beam is high, and therefore, when the polarizing structure is applied to a display screen, the brightness of the display screen can be improved.
In this embodiment, the light guide holes 25 extend from the upper surface 21 to the lower surface 22, and the extending depth d of the light guide holes 25 is two thousandths to one hundredth of the thickness of the polarizer 10. The extending depth d is the length from the midpoint a of the bottom of the light guiding hole 25 to the center point b of the top of the light guiding hole, and defines the distance from the midpoint a of the bottom of the light guiding hole 25 to the upper surface 21 of the light guiding layer as shown in fig. 2 a, where h=d×sin (180- α) when the first angle is greater than 90 degrees and equal to or less than 150 degrees. As shown in B of fig. 2, when the first angle is 30 degrees or more and less than 90 degrees, h=d=sinα. It can be appreciated that h=d when the first angle is equal to 90 degrees. After the h is determined, the distance h from the midpoint a of the bottom of each light guide hole 25 to the upper surface 21 can be observed very intuitively through the scale, so that whether the engraving process is good or not can be detected effectively.
In addition, in order to enable most of the light beam to be refracted through the light guide hole 25, the extending depth of the light guide hole 25 is not too shallow or too deep, and thus, the extending depth of the light guide hole 25 is limited mainly based on the refraction effect of the light guide hole 25 on the light beam.
As an alternative embodiment, as shown in fig. 1, 5 and 6, the light guiding holes 25 may be arranged from sparse to dense from the first side 23 of the light guiding layer 20 to the second side 24 of the light guiding layer 20. Specifically, taking the light source incident from the first side 23 as an example, since the light intensity is lost during the light propagation, the longer the light propagation distance is, the lower the incident light beam intensity is, so that the display screen near the first side 23 is brighter and the display screen near the second side 24 is darker, thereby causing uneven brightness of the display screen. The invention adopts the sparse-dense arrangement mode of the light guide holes, can increase the probability that the part of light beams close to the second side surface 24 passes through the light guide holes 25, and refracts the light beams into the polaroid 10, so that the brightness of the display screen is uniform.
As an alternative embodiment, as shown in fig. 7 to 9, a plurality of light guide holes 25 are uniformly arranged on the upper surface 21 of the light guide layer 20, so that the light guide holes 25 arranged at intervals are directly manufactured using a laser engraving technique at the time of manufacturing.
As yet another alternative embodiment, as shown in fig. 10 to 12, with the center line 26 of the light guiding layer 20 as a dividing line, the light guiding hole 25 located on one side of the center line 26 of the light guiding layer 20 is a light guiding hole near the first side 23, and the light guiding hole 25 located on the other side of the center line 26 of the light guiding layer 20 is a light guiding hole near the second side 24. The light guide holes 25 may be uniformly arranged from the first side 23 of the light guide layer 20 to the center line 26 of the upper surface 21, and then from sparse to dense to the second side 24 of the light guide layer 20 from the center line 26 of the upper surface 21.
As yet another alternative embodiment, as shown in fig. 13 to 15, with the center line 26 of the light guiding layer 20 as a dividing line, the light guiding hole 25 located on one side of the center line 26 of the light guiding layer 20 is a light guiding hole near the first side surface 23, and the light guiding hole 25 located on the other side of the center line 26 of the light guiding layer 20 is a light guiding hole near the second side surface 24. The light guide holes 25 can be uniformly arranged from the first side 23 of the light guide layer 20 to the center line 26 of the upper surface, and then are uniformly distributed from the center line 26 of the upper surface to the second side 24 of the light guide layer 20 in a more dense and uniform manner.
It should be appreciated that in both of the above ways, a uniform arrangement may be used in the area near the first side 23 where the light intensity is high, thereby reducing the difficulty of engraving. In the area near the second side 24 with lower light intensity, the light beams near the second side 24 are distributed uniformly from sparse to dense or more densely, so that the probability that the light beams near the second side 24 pass through the light guide holes 25 can be increased and refracted into the polarizer 10, and the brightness of the display screen is uniform.
In the present embodiment, the light guiding hole 25 is an elliptical cavity opening on the upper surface 21, and the opening of the light guiding hole 25 is elliptical, the length of the major axis of the light guiding hole 25 is two-fifths to four-fifths of the extension depth d, and the length of the minor axis of the light guiding hole 25 is one-fifth to three-fifths of the extension depth d.
Preferably, the length of the long axis of the light guide hole 25 is three fifths of the extension depth d, and the length of the short axis of the light guide hole 25 is two fifths of the extension depth d. With this numerical ratio, the elliptical cavity is enabled to enhance the ability to refract the light beam, allowing more light to enter the polarizer 10 after passing through the light guide holes 25.
In this embodiment, the light guide hole 25 has a medium therein, and the medium may be air. After the light beam is incident on the light guiding layer 20, part of the light beam propagating on the upper surface 21 of the light guiding layer 20 passes through the light guiding hole 25, and at this time, since the light guiding layer 20 is an acrylic film and the medium in the light guiding hole 25 is air, the light beam is refracted when entering and exiting from both walls of the light guiding hole 25. Therefore, the light guide hole adopts the design of the elliptic cavity, which is favorable for the refraction of the light beam and has strong directivity for the refraction of the light.
It is understood that the light guide holes 25 may be cone cavities, triangular prism cavities or spherical cavities as shown in fig. 4.
The following describes a specific principle of refraction of a light beam by the light guide hole:
since the light beams incident on the light guiding layer 20 have different incident directions, the light beams incident on the light guiding layer 20 from the first side 23 are classified into three types of light beams, i.e., a first type of light beam, a second type of light beam and a third type of light beam according to the result of the light beams incident on the light guiding layer 20. The first type of light beam is a light beam that passes through the light guide hole 25, the second type of light beam is a light beam that directly exits the light guide layer 20, and the third type of light beam is a light beam that directly enters the polarizer 10. While the light guiding holes 25 only affect the first type of light beam. After the first type light beam enters the light guiding layer 20, the first type light beam continues to propagate until the first type light beam refracts after passing through the light guiding hole 25, part of the refracted first type light beam enters the polarizer 10, and the rest of the refracted first type light beam exits the light guiding layer 20 through the upper surface 21 or the second side surface 24; the second type of light beam is directly emitted out of the light guiding layer 20 through the second side 24 after being emitted into the light guiding layer 20; similarly, the third type of light beam enters the polarizer 10 directly after entering the light guiding layer 20.
It can be seen that, by adopting the mode of arranging the light guide hole 25 on the light guide layer 20 and forming the certain angle α between the center line of the light guide hole 25 and the upper surface 21 of the light guide layer 20 in the embodiment of the present invention, the first type light beam can enter the polarizer 10 through the refraction and the light quantity of the incident polarizer 10 is increased, so as to achieve the purpose of improving the brightness of the display screen.
In this embodiment, the composite polarizing structure further includes a protective film 30, the protective film 30 covers the upper surface of the light guiding layer 20, and the protective film 30 completely covers the light guiding hole 25 and forms a closed space with a filling medium with the light guiding hole 25. The protective film 30 is used for protecting the polarized light structure from being extruded, scratched and rubbed by the outside, so that the performance of the polarized light structure is maintained.
In this embodiment, the filling medium in the closed space is air. Specifically, air naturally enters the light guide hole 25 when the light guide hole 25 is formed, and air remains in the light guide hole 25 when the protective film 30 covers the closed space. By adopting the mode, the process of filling the closed space with the medium is omitted, and the manufacturing process is simple and efficient.
According to the composite polarizing structure provided by the embodiment of the invention, the light guide hole forming a certain angle with the light guide layer is formed in the light guide layer, so that the light beam entering the light guide layer is refracted when passing through the light guide hole and enters the polarizer, and part of the light beam originally directly emitted out of the light guide layer is refracted and enters the polarizer, so that the incident light quantity of the polarizer is increased, and the brightness of the display screen is improved.
In addition, through the mode that makes a plurality of light guide holes from the first side of light guide layer to densely arrange to the second side of light guide layer from sparse, the probability that the light beam of weaker intensity passes through the light guide hole is increased to make more light beams get into the polaroid that is close to the second side after the light guide hole takes place the refraction, and then make display screen luminance show evenly.
Example two
The second embodiment of the present invention provides a method for manufacturing a composite polarizing structure, where the composite polarizing structure is the composite polarizing structure in the first embodiment. That is, the second embodiment of the present invention provides a method for preparing the composite polarizing structure of the first embodiment.
As shown in fig. 3, the preparation method of the present invention comprises the steps of:
201. a light guiding layer is formed on the polarizer.
In this embodiment, the step 201 includes the following steps:
uniformly covering an acrylic film on the polaroid to form a light guide layer. Specifically, a layer of acrylic film with the thickness of 0.1-0.3mm is uniformly covered on the upper surface of the polarized light of the polaroid to form a light guide layer. Therefore, the light guide layer is made of an acrylic film, the acrylic material has light transmittance of more than 90%, and light passing through the acrylic film is soft and clear. Meanwhile, the acrylic material has high wear resistance, good stability and high corrosion resistance.
202. The light guide layer is processed to form a plurality of light guide holes arranged at intervals on the light guide layer, and the center line of the light guide holes and the upper surface of the light guide layer form a first angle.
In this embodiment, the step 202 includes the following steps:
performing laser engraving on the light guide layer by adopting a laser engraving technology, and forming a plurality of first holes which are arranged at intervals; and removing the residual light guide layer material in each first hole to form a light guide hole. Specifically, the upper surface of the light guide layer is engraved by adopting a laser engraving technology so as to form a plurality of first holes which are obliquely arranged from the upper surface of the light guide layer to the lower surface, wherein the first holes are elliptic cylindrical holes. After the first hole is formed, the acrylic film material remained in the first hole is removed, so that the first hole becomes the light guide hole (i.e. elliptic cavity).
Specifically, the extended depth of the light guide hole formed by using the laser engraving technology is two thousandths to one hundredth of the thickness of the polarizer, the opening shape of the light guide hole is elliptical, the length of the long axis of the light guide hole is three fifths to four fifths of the extended depth, and the length of the short axis of the light guide hole is one fifth to two fifths of the extended depth. The laser engraving technology is used for enabling the inside of the light guide hole to be smooth, the cost is low, so that the light directivity of the light guide hole is stronger, the cost is reduced, and the polarizing structure is more economical.
In this embodiment, the preparation method further includes:
203. a protective film is formed on the light guide layer.
Specifically, the upper surface of the light guide layer is uniformly covered with a layer of high-temperature-resistant polyester film, so that the light guide layer is protected from being extruded, scratched and rubbed by the outside, and the performance of the composite polarized light structure is kept. A closed space with air medium is formed between the protective film and the light guide hole, and after the light guide hole is formed by using a laser engraving technology, air naturally enters the light guide hole, so that the medium in the light guide hole does not need to be replaced or vacuumized after the protective film is covered. The process is saved, and the manufacturing efficiency is improved.
According to the preparation method of the composite polarizing structure, provided by the embodiment of the invention, the light guide hole with a certain angle is formed on the upper surface of the light guide layer by the laser engraving technology, and the protective film is covered on the light guide layer, so that the polarizer, the light guide layer and the protective film are in seamless connection, the product reliability of the composite polarizing structure is improved, the medium in the light guide hole is not required to be replaced or vacuumized, and meanwhile, the process is saved and the manufacturing efficiency is improved.
The above describes in detail a composite polarizing structure and a preparation method thereof disclosed in the embodiments of the present invention, and specific examples are applied to illustrate the principles and embodiments of the present invention, and the above description of the embodiments is only for helping to understand the principles and core ideas of the present invention; meanwhile, as those skilled in the art will have variations in the specific embodiments and application scope in accordance with the ideas of the present invention, the present description should not be construed as limiting the present invention in view of the above.
Claims (9)
1. A composite polarizing structure, comprising:
a polarizer; and
the light guide layer is arranged on the polaroid, the light guide layer comprises an upper surface which is away from the polaroid, a plurality of light guide holes which are arranged at intervals are arranged on the upper surface of the light guide layer, the central lines of the plurality of light guide holes and the upper surface of the light guide layer form a first angle, and the light guide holes are used for refracting light beams entering the light guide layer when the light beams pass through the light guide holes so that the light beams enter the polaroid;
the light guide holes are distributed from the first side face of the light guide layer to the second side face of the light guide layer from sparse to dense, and the second side face of the light guide layer is arranged opposite to the first side face of the light guide layer;
the light guide layer further comprises a lower surface which is arranged opposite to the upper surface, and the lower surface is connected with the polaroid;
the opening of the light guide hole is positioned on the upper surface of the light guide layer, the light guide hole extends from the upper surface to the lower surface, and the extending depth of the light guide hole in the light guide layer is two thousandths to one hundredth of the thickness of the polaroid;
the light guide hole is an elliptical hole, the length of the long axis of the light guide hole is two fifths to four fifths of the extension depth of the light guide hole, and the length of the short axis of the light guide hole is one fifth to three fifths of the extension depth of the light guide hole.
2. The composite polarizing construction of claim 1, wherein each of the centerlines of each of the light guide holes are disposed in parallel and the light guide holes are disposed obliquely from the upper surface of the light guide layer to the lower surface of the light guide layer.
3. The composite polarizing structure of claim 1, wherein the first angle is 30 to 150 degrees, and the center line of the light guide hole is 90 degrees to the absorption axis of the polarizer.
4. The composite polarizing construction of claim 1, further comprising a protective film covering the upper surface of the light guiding layer, wherein the protective film completely covers the light guiding hole and forms a closed space with a filling medium therebetween.
5. The composite polarizing construction of claim 4, wherein the filler medium is air.
6. A method for preparing the composite polarizing structure according to any one of claims 1 to 5, comprising:
forming a light guide layer on the polarizer;
and processing the light guide layer to form a plurality of light guide holes arranged at intervals on the light guide layer, wherein the center line of the light guide holes and the upper surface of the light guide layer form a first angle.
7. The method of claim 6, wherein forming a light guiding layer on the polarizer comprises:
and uniformly covering an acrylic film on the polaroid to form the light guide layer.
8. The method of claim 6, wherein the processing the light guiding layer to form a plurality of light guiding holes disposed at intervals on the light guiding layer specifically comprises:
performing laser engraving on the light guide layer by adopting a laser engraving technology, and forming a plurality of first holes which are arranged at intervals;
and removing the residual light guide layer material in each first hole to form the light guide holes.
9. The method according to any one of claims 6 to 8, further comprising:
and forming a protective film on the light guide layer.
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| CN101122646A (en) * | 2006-08-11 | 2008-02-13 | 鸿富锦精密工业（深圳）有限公司 | Polarizer and liquid crystal display |
| CN104832883A (en) * | 2014-02-07 | 2015-08-12 | 立景光电股份有限公司 | Display module and light guide device |
| CN106873241A (en) * | 2017-02-09 | 2017-06-20 | 青岛海信电器股份有限公司 | A kind of backlight module and liquid crystal display device |
| CN106950641A (en) * | 2017-05-11 | 2017-07-14 | 京东方科技集团股份有限公司 | A kind of light guide plate, optics module and the display device that is all-trans |
| CN208795872U (en) * | 2018-08-23 | 2019-04-26 | 广东小天才科技有限公司 | A kind of compound structure of polarized light |
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2018
- 2018-08-23 CN CN201810966965.4A patent/CN108761629B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101122646A (en) * | 2006-08-11 | 2008-02-13 | 鸿富锦精密工业（深圳）有限公司 | Polarizer and liquid crystal display |
| CN104832883A (en) * | 2014-02-07 | 2015-08-12 | 立景光电股份有限公司 | Display module and light guide device |
| CN106873241A (en) * | 2017-02-09 | 2017-06-20 | 青岛海信电器股份有限公司 | A kind of backlight module and liquid crystal display device |
| CN106950641A (en) * | 2017-05-11 | 2017-07-14 | 京东方科技集团股份有限公司 | A kind of light guide plate, optics module and the display device that is all-trans |
| CN208795872U (en) * | 2018-08-23 | 2019-04-26 | 广东小天才科技有限公司 | A kind of compound structure of polarized light |
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| CN108761629A (en) | 2018-11-06 |
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